Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F42—AMMUNITION; BLASTING
  • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
  • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
  • F42C15/18—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved
  • F42C15/188—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a rotatable carrier
  • F42C15/192—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a rotatable carrier rotatable in a plane which is parallel to the longitudinal axis of the projectile

Definitions

• the subject of the invention is a projectile rocket, with detonator and muzzle safety, comprising a body topped by a hat, a striker to act on a primer upon impact, an arming mechanism, comprising a movable part arranged to first occupy a safety position, in which cooperation between the striker and the primer is impossible and then an armed position which allows this cooperation, a mechanical escapement timer to adjust the passage time of the part movable from the safety position to the armed position, this tempo ⁇ riser meshing with a toothing of the movable part, means for varying the duration of the passage from the safety position to the armed position.
• the object of the invention is to produce a robust, simple and inexpensive device making it possible to modify the time delay for the passage of the moving part from a well-defined initial position to a final well-defined position.
• the rocket which is the subject of the invention is characterized in that the timer is detachable so as to modify its position along the toothing " to modify the distance over which it cooperates with this toothing before the part mobile does not arrive in its armed position.
• Figure 1 is an axial section of this rocket.
• Figure 2 is a section along line II— II of Figure 1.
• Figure 3 is a partial section along line III— III of Figure 1.
• Figure h is a section along line IV-IV of Figure 1.
• Figure 5 is a partial view of Figure 2 showing another operating position.
• Figures 6 and 7 illustrate a control device.
• the rocket comprises a body 1 on which is mounted a cap 2 which can be angularly displaced relative to the body 1.
• the position given to the cap 2 is preserved thanks to the friction exerted on the body 1 by a ring 3 forming a cam, provided with two annular seals h and 5 and the operation of which will be explained later.
• the front part of the cap 2 carries a striker 6 pushed against a cap 7 by a spring 8 and provided with a tip 9.
• This striker is intended to cooperate with a primer 10 carried by a rotor 12, the latter being represented by Figure 1 in the safety position, position in which the primer is disposed outside the trajectory of the tip 9 of the striker 8.
• This rotor 12 is secured to a shaft 13 pivoting in bearings 14 carried by the body I.
• the ends of this shaft 13 each have a flat 15 located opposite a projection 16 of the ring 3 when the latter is in the safety position given by the angular position of the cap 2.
• FIGS. 3 and h The angular displacement of the rotor allowing the primer 10 to be brought into the operating position is controlled by a device clearly visible in FIGS. 3 and h.
• This device comprises an inertia lever 17 pivotally mounted on one of the bearings 14.
• This inertia lever has its center of gravity eccentric relative to the axis of the shaft 13 and it is retained in the safety position, illustrated in Figures 3 and 4, by a lock 18 engaged in a notch 19 of this lever, as well as in another notch 20 of the rotor 12, this lock being biased by a spring 21 towards the outside of the projectile, but it is retained in position by one of the projections 16 of the ring 3, when the latter is in the safety position.
• the lever 17 is subjected to the action of a pusher 22, subjected to the action of a spring 23, applying it against a bearing portion 24 of the lever 17.
• a torsion spring 25, wound on the shaft 13 of the rotor 12, is fixed by one of its ends to the lever 17 and by its other end to the shaft 13.
• This spring 25 is intended to supply the engine torque to rotate the rotor 12 after the start of the blow and bring it into the active position allowing the tip 9 of the striker to strike the primer 10.
• the rotation of the rotor 12 is braked by an exhaust timer 26 which includes a gear train multiplier 27 cooperating with a rocker arm 28.
• the drive mechanism is made by a sector toothed 29 integral with the rotor 12 and meshing with a toothed pinion 30 of the mechanism.
• the timer comprises two plates 36 and 36 'which are pivoted on one of the bearings 14 of the shaft 13, which allows angular movement of the timer around this shaft.
• Two delay durations are given by the two different positions of the timer, shown in FIGS. 2 and 5.
• the rotor 12 In the case of FIG. 2, the rotor 12 must turn counter-clockwise to take the armed position.
• the toothed sector 29 is engaged over the entire length of its teeth during this angular displacement. A little before the end of the movement, the sector 29 escapes the pinion 30 and the rotor 12 takes its final position.
• the position of the timer is such that the engagement of the sector 29 with the pinion 30 takes place, in the assured position of the rotor 12, near the end of the toothing of the sector.
• the rotor is therefore braked on a shorter stroke which therefore gives a shorter delay time.
• the setting of the timer in the desired position is obtained by an operation of the ring 3 which has ramps 37 to 40 which are shown diagrammatically in Figures 6 and 7. These ramps cooperate with two pins 41 and 42 of the timer to bring it into either of the positions illustrated in Figures 2 and 5.
• Figure 6 shows the ramps in the secured position of the ring 3, for which the timer occupies an average position between its two extreme positions. If the ring 3 is turned to move its ramps to the right, the ramp 39 cooperates with the stud 42 to switch the timer in the position of FIG. 5. A rotation of the ring 3 in the opposite direction would bring the timer into its position according to FIG. 2 by cooperation of the ramp 38 with the stud 41.
• the operation of the rocket is as follows:
• the ring 3 Before loading the weapon with the projectile, the ring 3 must be maneuvered for example using the cap 2 to remove the transport security by releasing the projections 16 from the flats 15, this ring being turned in one direction or in the 'other to toggle the timer in the one of the two positions that has been chosen.
• this lever 17 When this lever 17 has made a rotation of about a quarter of a turn, it completely releases the lock 18 thanks to a recess 35 provided in this lever and in which the lock 18 engages to lock the lever 17 in its armed position.
• the rotor 12 is then unlocked and turns under the effect of the engine torque exerted by the spring 25, this movement being timed by the mechanism 26 to the selected value.
• the primer 10 is located opposite the tip 9 of the striker, while a reinforcing relay 31 carried by the rotor is placed in front of a pyropho ⁇ que relay 32 and a detonator 33.

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=4246926

Family Applications (1)

Country Status (8)

Cited By (1)

Families Citing this family (6)

Citations (4)

Family Cites Families (6)

• 1985
  • 1985-07-12 CH CH302485A patent/CH663875GA3/fr unknown
• 1986
  • 1986-06-04 CA CA000510851A patent/CA1267566A/fr not_active Expired - Fee Related
  • 1986-06-11 ES ES555935A patent/ES8800423A1/es not_active Expired
  • 1986-06-12 DE DE8686903192T patent/DE3667729D1/de not_active Expired - Fee Related
  • 1986-06-12 US US07/041,075 patent/US4739706A/en not_active Expired - Fee Related
  • 1986-06-12 WO PCT/CH1986/000085 patent/WO1987000616A1/fr active IP Right Grant
  • 1986-06-12 EP EP86903192A patent/EP0229086B1/de not_active Expired
• 1987
  • 1987-03-11 FI FI871055A patent/FI89981C/fi not_active IP Right Cessation

Patent Citations (4)

Also Published As

Similar Documents

Legal Events